Another attempt at matrix exclusion

Author: shayancanonical

.github/workflows/ci.yaml

@@ -117,8 +117,8 @@ jobs:
             agent-version: "2.9.45"
             libjuju-version:  "2.9.44.1"
         exclude:
-          - groups.path_to_test_file: tests/integration/test_data_integrator.py
-            ubuntu-versions.series: focal
+          - groups: {path_to_test_file: tests/integration/test_data_integrator.py}
+            ubuntu-versions: {series: focal}
     name: ${{ matrix.juju-snap-channel }} - (GH hosted) ${{ matrix.groups.job_name }} | ${{ matrix.ubuntu-versions.series }}
     needs:
       - lint